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ILD4071 Datasheet(PDF) 6 Page - Infineon Technologies AG |
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ILD4071 Datasheet(HTML) 6 Page - Infineon Technologies AG |
6 / 25 page Datasheet 6 Rev. 1.0, 2011-11-16 ILD4071 Pin Configuration 3 Pin Configuration 3.1 Pin Assignment Figure 2 Pin Configuration ILD4071 3.2 Pin Definitions and Functions Pin Symbol Function 1VREC Voltage Recirculation Output and Internal Supply Input; This pin is the supply pin of the IC (see block diagram). Furthermore the cathode of the integrated fast freewheeling diode is connected to this pin as well. 2ST Status Output; Open collector diagnostic output to indicate an open load failure. Refer to Chapter 7 for more details. 3EN Enable; Apply logic HIGH signal to enable the device 4 SET SET Input; Connect a low power resistor to adjust the output current. 5 PWMI PWM Input; PWM signal for dimming LEDs. Connect external R and C combination to achieve an auto PWM-dimming function with defined frequency and duty cycle. 1) internal PWM dimming function (external RC connected to GND) 2) external PWM dimming function (µC is controlling this pin) Refer to Chapter 6 for more details. 6FREQ FREQuency Select Input; Connect external Resistor and Capacitor to GND to set the OFF-time of the switching frequency. 7GND Ground; Connect to system ground. ST GND EN FREQ SW 5 6 4 3 2 7 1 8 SET VREC PWMI EP |
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